/* FileSaver.js
 * A saveAs() FileSaver implementation.
 * 1.3.2
 * 2016-06-16 18:25:19
 *
 * By Eli Grey, http://eligrey.com
 * License: MIT
 *   See https://github.com/eligrey/FileSaver.js/blob/master/LICENSE.md
 */

/*global self */
/*jslint bitwise: true, indent: 4, laxbreak: true, laxcomma: true, smarttabs: true, plusplus: true */

/*! @source http://purl.eligrey.com/github/FileSaver.js/blob/master/FileSaver.js */

var saveAs = saveAs || (function (view) {
    "use strict";
    // IE <10 is explicitly unsupported
    if (typeof view === "undefined" || typeof navigator !== "undefined" && /MSIE [1-9]\./.test(navigator.userAgent)) {
        return;
    }
    var
          doc = view.document
          // only get URL when necessary in case Blob.js hasn't overridden it yet
        , get_URL = function () {
            return view.URL || view.webkitURL || view;
        }
        , save_link = doc.createElementNS("http://www.w3.org/1999/xhtml", "a")
        , can_use_save_link = "download" in save_link
        , click = function (node) {
            var event = new MouseEvent("click");
            node.dispatchEvent(event);
        }
        , is_safari = /constructor/i.test(view.HTMLElement) || view.safari
        , is_chrome_ios = /CriOS\/[\d]+/.test(navigator.userAgent)
        , throw_outside = function (ex) {
            (view.setImmediate || view.setTimeout)(function () {
                throw ex;
            }, 0);
        }
        , force_saveable_type = "application/octet-stream"
        // the Blob API is fundamentally broken as there is no "downloadfinished" event to subscribe to
        , arbitrary_revoke_timeout = 1000 * 40 // in ms
        , revoke = function (file) {
            var revoker = function () {
                if (typeof file === "string") { // file is an object URL
                    get_URL().revokeObjectURL(file);
                    console.log(file)
                } else { // file is a File
                    file.remove();
                }
            };
            setTimeout(revoker, arbitrary_revoke_timeout);
        }
        , dispatch = function (filesaver, event_types, event) {
            event_types = [].concat(event_types);
            var i = event_types.length;
            while (i--) {
                var listener = filesaver["on" + event_types[i]];
                if (typeof listener === "function") {
                    try {
                        listener.call(filesaver, event || filesaver);
                    } catch (ex) {
                        throw_outside(ex);
                    }
                }
            }
        }
        , auto_bom = function (blob) {
            // prepend BOM for UTF-8 XML and text/* types (including HTML)
            // note: your browser will automatically convert UTF-16 U+FEFF to EF BB BF
            if (/^\s*(?:text\/\S*|application\/xml|\S*\/\S*\+xml)\s*;.*charset\s*=\s*utf-8/i.test(blob.type)) {
                return new Blob([String.fromCharCode(0xFEFF), blob], { type: blob.type });
            }
            return blob;
        }
        , FileSaver = function (blob, name, no_auto_bom) {
            if (!no_auto_bom) {
                blob = auto_bom(blob);
            }
            // First try a.download, then web filesystem, then object URLs
            var
                  filesaver = this
                , type = blob.type
                , force = type === force_saveable_type
                , object_url
                , dispatch_all = function () {
                    dispatch(filesaver, "writestart progress write writeend".split(" "));
                }
                // on any filesys errors revert to saving with object URLs
                , fs_error = function () {
                    if ((is_chrome_ios || (force && is_safari)) && view.FileReader) {
                        // Safari doesn't allow downloading of blob urls
                        var reader = new FileReader();
                        reader.onloadend = function () {
                            var url = is_chrome_ios ? reader.result : reader.result.replace(/^data:[^;]*;/, 'data:attachment/file;');
                            var popup = view.open(url, '_blank');
                            if (!popup) view.location.href = url;
                            url = undefined; // release reference before dispatching
                            filesaver.readyState = filesaver.DONE;
                            dispatch_all();
                        };
                        reader.readAsDataURL(blob);
                        filesaver.readyState = filesaver.INIT;
                        return;
                    }
                    // don't create more object URLs than needed
                    if (!object_url) {
                        object_url = get_URL().createObjectURL(blob);
                    }
                    if (force) {
                        view.location.href = object_url;
                    } else {
                        var opened = view.open(object_url, "_blank");
                        if (!opened) {
                            // Apple does not allow window.open, see https://developer.apple.com/library/safari/documentation/Tools/Conceptual/SafariExtensionGuide/WorkingwithWindowsandTabs/WorkingwithWindowsandTabs.html
                            view.location.href = object_url;
                        }
                    }
                    filesaver.readyState = filesaver.DONE;
                    dispatch_all();
                    revoke(object_url);
                }
            ;
            filesaver.readyState = filesaver.INIT;

            if (can_use_save_link) {
                object_url = get_URL().createObjectURL(blob);
                setTimeout(function () {
                    save_link.href = object_url;
                    save_link.download = name;
                    click(save_link);
                    dispatch_all();
                    revoke(object_url);
                    filesaver.readyState = filesaver.DONE;
                });
                return;
            }

            fs_error();
        }
        , FS_proto = FileSaver.prototype
        , saveAs = function (blob, name, no_auto_bom) {
            return new FileSaver(blob, name || blob.name || "download", no_auto_bom);
        }
    ;
    // IE 10+ (native saveAs)
    if (typeof navigator !== "undefined" && navigator.msSaveOrOpenBlob) {
        return function (blob, name, no_auto_bom) {
            name = name || blob.name || "download";

            if (!no_auto_bom) {
                blob = auto_bom(blob);
            }
            return navigator.msSaveOrOpenBlob(blob, name);
        };
    }

    FS_proto.abort = function () { };
    FS_proto.readyState = FS_proto.INIT = 0;
    FS_proto.WRITING = 1;
    FS_proto.DONE = 2;

    FS_proto.error =
    FS_proto.onwritestart =
    FS_proto.onprogress =
    FS_proto.onwrite =
    FS_proto.onabort =
    FS_proto.onerror =
    FS_proto.onwriteend =
        null;
    return saveAs;
}(
       typeof self !== "undefined" && self
    || typeof window !== "undefined" && window
    || this.content
));
// `self` is undefined in Firefox for Android content script context
// while `this` is nsIContentFrameMessageManager
// with an attribute `content` that corresponds to the window

if (typeof module !== "undefined" && module.exports) {
    module.exports.saveAs = saveAs;
} else if ((typeof define !== "undefined" && define !== null) && (define.amd !== null)) {
    define("FileSaver.js", function () {
        return saveAs;
    });
}

var mediaStream;
var recorderFile;
var stopRecordCallback;
var openBtn = document.getElementById("openCamera");
openBtn.onclick = function () {
    if (this.innerText == "打开摄像头") {
        console.log(this.innerText)
        openCamera();
    } else if (this.innerText == "开始录制") {
        startRecord();
        this.innerText = "停止录制"
      
    } else if (this.innerText == "停止录制") {
        this.innerText = "保存"
      
        stopRecord(function () {
            alert("录制成功!", function () { });
        });
    } else if (this.innerText == "保存") {
        saver();
        this.innerText = "打开摄像头"
     
    }


};

var mediaRecorder;
var videosContainer = document.getElementById('videos-container');
var startTime = 0;
function openCamera() {
    var len = videosContainer.childNodes.length;
    while (videosContainer.hasChildNodes()) //当div下还存在子节点时 循环继续
    {
        videosContainer.removeChild(videosContainer.firstChild);
    }
    var video = document.createElement('video');

    var videoWidth = 488;
    var videoHeight = 388;

    video.controls = false;
    video.muted = true;
    video.width = videoWidth;
    video.height = videoHeight;
   

    MediaUtils.getUserMedia(true, true, function (err, stream) {
        if (err) {
            throw err;
            alert("请检查摄像头!", function () { });
        } else {
            // 通过 MediaRecorder 记录获取到的媒体流
            var options = {
                audioBitsPerSecond: 128000,
                videoBitsPerSecond: 2500000,
                mimeType: "video/webm;codecs=vp8,opus"
            }
            mediaRecorder = new MediaRecorder(stream, options);
            mediaStream = stream;
            var chunks = [];//通道
           
            video.srcObject = stream;
            video.play();

            videosContainer.appendChild(video);
            mediaRecorder.ondataavailable = function (e) {
                mediaRecorder.blobs.push(e.data);
                chunks.push(e.data);
            };
            mediaRecorder.blobs = [];

            mediaRecorder.onstop = function (e) {
                var duration = new Date().getTime() - startTime;
                console.log(new Date().getTime())
                console.log(duration)
                var tmpBlob = new Blob(chunks, { 'type': mediaRecorder.mimeType });
                ysFixWebmDuration(tmpBlob, duration, function (fixedBlob) {
                    recorderFile = fixedBlob
                   console.log(recorderFile)
                });
                chunks.length = 0;
                if (null != stopRecordCallback) {
                    stopRecordCallback();
                }
               
                $('#openCamera').text('保存');
            };
            $('#openCamera').text('开始录制');
        }
    });

}
// 停止录制
function stopRecord(callback) {
    stopRecordCallback = callback;
    // 关闭媒体流
    MediaUtils.closeStream(mediaStream);
    // 终止录制器
    mediaRecorder.stop();
}

var MediaUtils = {
    /**
    * 获取用户媒体设备(处理兼容的问题)
    * @param videoEnable {boolean} - 是否启用摄像头
    * @param audioEnable {boolean} - 是否启用麦克风
    * @param callback {Function} - 处理回调
    */
    getUserMedia: function (videoEnable, audioEnable, callback) {
        navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia
        || navigator.msGetUserMedia || window.getUserMedia;
        var constraints = { video: videoEnable, audio: audioEnable };
        if (navigator.mediaDevices && navigator.mediaDevices.getUserMedia) {
            navigator.mediaDevices.getUserMedia(constraints).then(function (stream) {
                callback(false, stream);
            })['catch'](function (err) {
                callback(err);
            });
        } else if (navigator.getUserMedia) {
            navigator.getUserMedia(constraints, function (stream) {
                callback(false, stream);
            }, function (err) {
                callback(err);
            });
        } else {
            callback(new Error('Not support userMedia'));
        }
    },

    /**
    * 关闭媒体流
    * @param stream {MediaStream} - 需要关闭的流
    */
    closeStream: function (stream) {
        if (typeof stream.stop === 'function') {
            stream.stop();
        }
        else {
            let trackList = [stream.getAudioTracks(), stream.getVideoTracks()];

            for (let i = 0; i < trackList.length; i++) {
                let tracks = trackList[i];
                if (tracks && tracks.length > 0) {
                    for (let j = 0; j < tracks.length; j++) {
                        let track = tracks[j];
                        if (typeof track.stop === 'function') {
                            track.stop();
                        }
                    }
                }
            }
        }
    }
};

function startRecord() {
    mediaRecorder.start();
    startTime = new Date().getTime();
    console.log(startTime)
}

//webm格式
function saver() {
    var file = new File([recorderFile],'视频.mp4', {
        type: 'video/mp4'
    });
    saveAs(file);
}


//function send() {
//    var file = new File([recorderFile], getUrlKey('reportId') + '-构音功能(' + $('.orthopedy').attr('curName') + ').mp4', {
//        type: 'video/mp4'
//    });
//    var data = new FormData();
//    data.append("username", "test");
//    data.append("userfile", file);

//    var req = new XMLHttpRequest();
//    req.open("POST", "com.spinsoft.bip.frame.utils.image.saveMp4.biz.ext");
//    req.send(data);
//}

//获取链接参数
function getUrlKey(name) {
    return (
      decodeURIComponent(
        (new RegExp('[?|&]' + name + '=' + '([^&;]+?)(&|#|;|$)').exec(
          location.href
        ) || [, ''])[1].replace(/\+/g, '%20')
      ) || null
    );
};
